Output Conversion Characteristics - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Analog control - intelligent function module
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Output conversion characteristics

The output conversion characteristics of D/A conversion are expressed by the slope of the straight line connected between
the offset and gain values both of which are used when a digital value written from CPU module is converted to the voltage or
current output value.
Offset value
The analog voltage or current value generated when the digital value 0 is set from the CPU module.
Gain value
The analog voltage or current value generated when the digital value 32000 is set from the CPU module.
Voltage output characteristic
The following shows the list of analog output ranges at the voltage output and the graphs of the voltage input characteristics.
V
+15
+10
+5
0
(4)
-5
-10
-15
-32768
-32000
digit: Digital value
V: Analog output voltage (V)
(a): Practical analog output range
No.
Analog output range
setting
(1)
0 to 10 V
(2)
0 to 5 V
(3)
1 to 5 V
(4)
-10 to +10 V
User range setting (voltage)
*1 Set the offset value and gain value in the user range setting within a range satisfying the following conditions. Failure to satisfy the
conditions may not result in proper D/A conversion.
 Setting range of the offset value and gain value: -10 to +10 V
 ((Gain value) - (Offset value))  2.0 V
*2 Maximum resolution in the user range setting. The resolution reaches the maximum when (gain value - offset value) = 10 V. Even when
(gain value - offset value) < 10 V, the maximum resolution is unchanged.
• Set values within the practical digital input and analog output ranges of each output range. If the range is
exceeded, the resolution and accuracy may not fall within the range of the performance specifications. (Do
not use values in the dotted line region in the graph of voltage output characteristics.)
2 FX5-4DA
178
2.2 Specifications
(1)
(3)
1
(2)
-768
0
Offset value
0 V
0 V
1 V
0 V
*1
(a)
digit
+32000
+32767
Gain value
Digital value
10 V
0 to 32000
5 V
5 V
10V
-32000 to +32000
*1
Resolution
312.5 V
156.3 V
125.0 V
312.5 V
*2
312.5 V

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